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/*=========================================================================
*
* Copyright NumFOCUS
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* https://www.apache.org/licenses/LICENSE-2.0.txt
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*=========================================================================*/
/*=========================================================================
*
* Portions of this file are subject to the VTK Toolkit Version 3 copyright.
*
* Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
*
* For complete copyright, license and disclaimer of warranty information
* please refer to the NOTICE file at the top of the ITK source tree.
*
*=========================================================================*/
#ifndef itkLabelMapFilter_hxx
#define itkLabelMapFilter_hxx
#include <mutex>
#include "itkTotalProgressReporter.h"
namespace itk
{
template <typename TInputImage, typename TOutputImage>
LabelMapFilter<TInputImage, TOutputImage>::LabelMapFilter()
{
this->DynamicMultiThreadingOn();
this->ThreaderUpdateProgressOff();
}
template <typename TInputImage, typename TOutputImage>
void
LabelMapFilter<TInputImage, TOutputImage>::GenerateInputRequestedRegion()
{
// call the superclass' implementation of this method
Superclass::GenerateInputRequestedRegion();
// We need all the input.
InputImagePointer input = const_cast<InputImageType *>(this->GetInput());
if (!input)
{
return;
}
input->SetRequestedRegion(input->GetLargestPossibleRegion());
}
template <typename TInputImage, typename TOutputImage>
void
LabelMapFilter<TInputImage, TOutputImage>::EnlargeOutputRequestedRegion(DataObject *)
{
this->GetOutput()->SetRequestedRegion(this->GetOutput()->GetLargestPossibleRegion());
}
template <typename TInputImage, typename TOutputImage>
void
LabelMapFilter<TInputImage, TOutputImage>::BeforeThreadedGenerateData()
{
m_LabelObjectIterator = typename InputImageType::Iterator(this->GetLabelMap());
}
template <typename TInputImage, typename TOutputImage>
void
LabelMapFilter<TInputImage, TOutputImage>::AfterThreadedGenerateData()
{
this->UpdateProgress(1.0);
}
template <typename TInputImage, typename TOutputImage>
void
LabelMapFilter<TInputImage, TOutputImage>::DynamicThreadedGenerateData(const OutputImageRegionType &)
{
const auto numberOfLabelObjects = this->GetLabelMap()->GetNumberOfLabelObjects();
TotalProgressReporter progress(this, numberOfLabelObjects, numberOfLabelObjects);
while (true)
{
LabelObjectType * labelObject;
// begin mutex lock
{
const std::lock_guard<std::mutex> lockGuard(m_LabelObjectContainerLock);
if (m_LabelObjectIterator.IsAtEnd())
{
// mutex lock holder deleted
return;
}
// get the label object
labelObject = m_LabelObjectIterator.GetLabelObject();
// increment the iterator now, so it will not be invalidated if the object
// is destroyed
++m_LabelObjectIterator;
// unlock the mutex, so the other threads can get an object
}
// end mutex lock
// and run the user defined method for that object
this->ThreadedProcessLabelObject(labelObject);
progress.CompletedPixel();
}
}
template <typename TInputImage, typename TOutputImage>
void
LabelMapFilter<TInputImage, TOutputImage>::ThreadedProcessLabelObject(LabelObjectType * itkNotUsed(labelObject))
{
// the subclass should override this method
}
} // end namespace itk
#endif
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